Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Sender: mkrishn=codeaurora.org@mg.codeaurora.org
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII;
 format=flowed
Content-Transfer-Encoding: 7bit
Date:   Tue, 05 Oct 2021 15:22:57 +0530
From:   mkrishn@codeaurora.org
To:     Stephen Boyd <swboyd@chromium.org>
Cc:     devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        linux-kernel@vger.kernel.org, kalyan_t@codeaurora.org,
        sbillaka@codeaurora.org, abhinavk@codeaurora.org,
        robdclark@gmail.com, bjorn.andersson@linaro.org,
        khsieh@codeaurora.org, rajeevny@codeaurora.org,
        freedreno@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
        robh+dt@kernel.org
Subject: Re: [PATCH v1 2/4] arm64: dts: qcom: sc7280: add display dt nodes
In-Reply-To: <CAE-0n53wqdo7NBZn4UMRZDtc3MrF6JdvZpjcfGapJT1s5iV2jQ@mail.gmail.com>
References: <1629282424-4070-1-git-send-email-mkrishn@codeaurora.org>
 <1629282424-4070-2-git-send-email-mkrishn@codeaurora.org>
 <CAE-0n50b=pX=1MFwGPDvDR=O03tUAkAgyMonGm2+SXBft=16KQ@mail.gmail.com>
 <5adf2ab2c2a162272509d253bd797721@codeaurora.org>
 <CAE-0n53kQU=8pdcWR0OZap1wDgxxwed0qvfaGruc71YT5Cj1iA@mail.gmail.com>
 <8f344213978f31c04e80b804a931db56@codeaurora.org>
 <CAE-0n53wqdo7NBZn4UMRZDtc3MrF6JdvZpjcfGapJT1s5iV2jQ@mail.gmail.com>
Message-ID: <41fb0eec922ff8499bb4b95ab29000f3@codeaurora.org>
User-Agent: Roundcube Webmail/1.3.9
Precedence: bulk

On 2021-10-05 07:21, Stephen Boyd wrote:
> Quoting mkrishn@codeaurora.org (2021-09-30 23:39:07)
>> On 2021-09-30 23:28, Stephen Boyd wrote:
>> > Quoting mkrishn@codeaurora.org (2021-09-30 04:56:59)
>> >> On 2021-08-19 01:27, Stephen Boyd wrote:
>> >> > Quoting Krishna Manikandan (2021-08-18 03:27:02)
>> >> >> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> >> >> b/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> >> >> index 53a21d0..fd7ff1c 100644
>> >> >> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> >> >> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> >> >> +
>> >> >> +                       status = "disabled";
>> >> >> +
>> >> >> +                       mdp: mdp@ae01000 {
>> >> >
>> >> > display-controller@ae01000
>> >>
>> >> Stephen,
>> >>     In the current driver code, there is a substring comparison for
>> >> "mdp"
>> >> in device node name as part of probe sequence. If "mdp" is not present
>> >> in the node name, it will
>> >>     return an error resulting in probe failure. Can we continue using
>> >> mdp
>> >> as nodename instead of display controller?
>> >>
>> >
>> > Can we fix the driver to not look for node names and look for
>> > compatible
>> > strings instead? It took me a minute to find compare_name_mdp() in
>> > drivers/gpu/drm/msm/msm_drv.c to understand what you're talking about.
>> > Perhaps looking for qcom,mdp5 in there will be sufficient instead of
>> > looking at the node name.
>> 
>> Sure Stephen. I will make the necessary changes in msm_drv.c to look 
>> for
>> compatible string instead of node name.
>> Can I include these two changes (changing mdp--> display controller 
>> and
>> msm_drv.c changes) in a separate series ?
>> 
> 
> Sure. So you'll send the drm driver change now and we'll get the DT
> change after that with the more generic node name?

Yes Stephen.I have raised the change to fix the driver issue.
https://patchwork.kernel.org/project/linux-arm-msm/patch/1633427071-19523-1-git-send-email-mkrishn@codeaurora.org/

Regards,
Krishna